Beyonce found herself caught in the middle of an extraordinary family row after video footage emerged of her sister Solange Knowles appearing to ferociously attack her husband Jay Z.

The shocking incident was captured on a security camera from inside an elevator and shows the younger sibling wildly kicking and swinging her arms at Jay, 44, while Beyonce, 32, calmly stands to the side.

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In the footage, obtained by TMZ, Jay Z, Beyonce and Solange enter the elevator before Solange appears to start shouting at the rapper before launching herself at him.

Solange appears to hit Jay-Z while Beyonce stands to the side in the elevator (Picture: TMZ/YouTube)

Jay Z is seen holding his face after an incident involving his wife’s sister, Solange Knowles (Picture: Splash News)

At one point, the 27-year-old singer throws her leg out to kick him whilst being held back by Beyonce’s bodyguard Julius and lands three blows on Jay before he tries to push her leg away.

Only then does Beyonce make a move and try to defend her husband from her sister’s alleged attack.

The trio were said to be heading back to their hotel room at The Standard Hotel in New York City after the Met ball last week.

Beyonce’s security guard pulls Solange to the other side of the lift (Picture: TMZ/YouTube)

During the scuffle, Bey’s bodyguard Julius can be seen pressing the emergency stop button at the 12th floor of the hotel.

It’s unclear what the rift is over but it serves as another bitter family feud for Beyonce.

She famously sacked her dad, Matthew Knowles, as her manager back in 2011 after reports he stole money from her, a claim he vehemently denies.

Beyonce and Solange also failed to attend his wedding to long-time love Gena Avery last year claiming they had previous engagements.

While Solange performed at the Glastonbury Festival, Beyonce had no scheduled show for her The Mrs Carter Show World Tour.

Meanwhile, Beyonce and Jay Z seem to have put the incident behind them as they looked the picture of wedded bliss as they enjoyed front row seats at the Barclays Centre for the Brooklyn Nets vs Miami Heat play-off in New York on Saturday.

Not a care in the world: Beyonce and Jay Z sit next to Jake Gyllenhaal at the Barclays Center in New York City on Saturday (Picture: PA)

Representatives for both Solange Knowles and Jay Z have been contacted by Metro and are yet to respond.